Pipe couplers
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
Sep 27, 1988
Grant Date -
N/A
app pub date -
Sep 4, 1984
filing date -
Sep 4, 1984
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
Rings of shape memory metal are deformed to be insertable between coaxial and overlapping surfaces of a conduit and a coupler so that upon heating above their transition temperature, the rings attempt to return to their undeformed shape and seal the opening between the two surfaces; the sealing rings being concave-convex with the convex surface directed toward the adjacent end of the conduit whereby interval pressure in the conduit tends to further expand the metal and increase the seal. Retainer rings in the general form of the section of a conic may be employed to provide additional strength against separation.
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